Dam it for the love of cfw. Your right I done it the once. How could I forget that ahhh. Carlsberg don't make noobs but if they did I'm winning

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As the QA flag is set to off on OFW, you will probably have to do the second install using the recovery menu as you may not be able to install the same firmware version over itself using the regular 'Update via USB' menu option.

Ah I see. Interesting that the QA flag remains enabled even after reverting back to OFW. Nothing to worry about mate, no harm done.

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Here is my understanding of the QA status, some guys know this topic better than I do though & might correct me if I am wrong about something.

On modern 4.xx kernels, for security purposes, the mean to make changes to the QA flag (stored in syscon) via official syscall was completely removed, no matter the level of user permission or control (ofw/cfw).
Consequently, a hack had to be put in place to be able to patch the syscon data to change the flag value. Needless to say that the current hack will only work on CFW due to the fact that to access the syscon data we must currently rely on lower level lv1 functions only usable if both lv1 & lv2 kernel protections have been defeated.
If I remember this correctly, the QA toggle remained as an individual patch, it would have been possible to restore QA Toggling as a syscall instead, maybe an option for syscall 8(?) or whatever, making it more easily usable by devs. The need isn't huge because in theory users should really only toggle QA once in the console's life & keeping payloads somewhat minimalistic should always be a priority imho. But I digress here..

Once toggled, the flag in the syscon data should remain untouched, installing new firmware leads to some changes made in syscon, for instance the system will update the syscon data corresponding to the last installed fw version number however the QA flag data doesn't get updated so installing official or custom firmwares should make no difference to the QA status of the console.